Problem 8-25 Air pollution control specialists in southern California monitor th

Question

Problem 8-25 Air pollution control specialists in southern California monitor the amount of ozone, carbon dioxide, and nitrogen dioxide in the air on an hourly basis. The hourly time s exhibit seasonality, with the levels of pollutants showing patterns that vary over the hours in the day. On July 15, 16, and 17, the following levels of nitrogen dioxide w the 12 hours from 6:00 A.M. to 6:00 P.M. Click on the datafile logo to reference the data. DATA file July 15 25 28 35 50 60 60 40 35 30 25 25 20 July 16: 28 30 35 48 60 65 50 40 35 2520 20 July 17: 35 42 45 70 72 75 60 45 40 25 25 25 (a) Choose the correct time series plot. 0 60 50 30 20 20 1s 15 15 1s 15 35 15 15 15 15 i« 1« 1« 16 161 677 7 7 177 7 17 Time Period 15 is: 1515| 15: 15 15151 s 15 | 15 | 15 16 16 | 6/ 16 asi 16 16| 161616| 1636 171 17: 171 171 17 Time Period

Explanation / Answer

In my opinion model developed in part d would be effective.Dummy variable method is too appropriate in this type problems.

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